<template>
  <view>
	  <!-- 搜索 -->
    <view class="search-box">
      <uni-search-bar @input="input" :radius="100" cancelButton="none" placeholder="请输入搜索内容"></uni-search-bar>
    </view>
    <!-- 搜索建议列表 -->
    <view class="sugg-list" v-if="searchResults.length !== 0">
      <view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item)">
        <view class="goods-name">{{item.goods_name}}</view>
        <uni-icons type="right" size="16"></uni-icons>
      </view>
    </view>
    <!-- 搜索历史 -->
    <view class="history-box" v-else-if="historyList.length !== 0">
      <!-- 标题区域 -->
      <view class="hotory-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="clean"></uni-icons>
      </view>
      <!-- 列表区域 -->
      <view class="hostory-list">
        <uni-tag :text="item" v-for="(item,i) in historyList" :key="i" @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
  </view>
</template>
<script>
  export default {
    data() {
      return {
		// 定时器
        timer:null,
		// 关键词
        kw:'',
        //搜索的结果列表
        searchResults:[],
        //搜索关键词的搜索历史
        historyList:['a','app','apple']
      };
    },
    onLoad() {
       this.historyList = JSON.parse(uni.getStorageSync('kw')||'[]')
    },
    methods:{
      //input输入事件的处理函数
      input(e) {
        // 清除延时器
        clearTimeout(this.timer)
        // 重启延时器
        this.timer = setTimeout(() => {
          console.log(e)
          //关键词赋值
          this.kw = e
          this.getSearchList()
        },500)
      },
      //获取搜索结果
      async getSearchList() {
        //判断关键词是否为空
        if(this.kw.length === 0) {
          this.searchResults = []
          return
        }
        const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
        if(res.meta.status !== 200) return uni.$showMsg()
        this.searchResults = res.message
        this.saveSearchHiostor()
      },
      gotoDetail(item) {
        console.log(item)
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id='+ item.goods_id
        })
      },
      // 保存搜索记录
      saveSearchHiostor() {
         // this.historyList.unshift(this.kw)
		 // 翻转历史搜索
         this.historyList.reverse()
		 // 关键词去重添加
         const set = new Set(this.historyList)
         set.delete(this.kw)
         set.add(this.kw)
         this.historyList = Array.from(set)
         this.historyList.reverse()
         //对搜索历史数据，进行永久化的存储
         uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      //清除历史记录
      clean() {
        this.historyList = []
        uni.setStorageSync('kw','[]')
      },
      gotoGoodsList(kw) {
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query=' + kw
        })
      }
    }
  }
</script>

<style lang="scss">
.search-box{
  position: sticky;
  top: 0;
  z-index: 999;
}
.sugg-list{
  padding:0 5px ;
  .sugg-item{
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    .goods-name{
      white-space:nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
  }
}
.history-box{
  padding: 0 5px;
  .hotory-title{
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border: 1px solid #efefef;
  }
  .hostory-list{
    display: flex;
    flex-wrap: wrap;
    .uni-tag{
      display: block;
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
